Sensitive magnetic control of ensemble nuclear spin hyperpolarization in diamond

Wang, Hai-Jing; Shin, C.S.; Avalos, Claudia E.; Seltzer, Scott J.; Budker, Dmitry; Pines, Alexander; Bajaj, Vikram S.

doi:10.1038/ncomms2930

Cited by 69 publications

(129 citation statements)

References 57 publications

(83 reference statements)

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“…2 (see Methods). The measured spectra have chemically informative fine features that differ vastly from ODMR spectra based on the allowed electron spin transitions of the NV À centre alone 21,22 . The majority of the fine features can be assigned to the N S centre 17,18,20,23 (see Supplementary Note 1), from which almost all calculated transitions (blue lines on top of each spectrum) are present in the observed spectra.…”

Section: Resultsmentioning

confidence: 95%

“…The average distance between nearest NV À centres is B8 nm and that between an NV À centre and the nearest N S centre is B3 nm, as estimated by the Poisson distribution for the typical distance between neighbouring particles 46 . The ODMR apparatus was described in detail elsewhere 22 and we only briefly describe it here. A continuous beam from a 532-nm laser with optical power of 2 mW is focused on the diamond by an objective lens with a numerical aperture of 0.7 to achieve optical power density of B5 mW mm À 2 .…”

Section: Methodsmentioning

confidence: 99%

“…The fluorescence signal from the NV À is collected by an avalanche photo detector after passing a dichroic mirror and a long-pass filter 45 . The external magnetic field is applied using a permanent magnet aligned to one of the NV À symmetry axes, with the field strength adjusted by the magnet's distance to the diamond and determined using the NV À centres as a magnetometer 21,22 . The RF radiation is swept from 1 to 300 MHz using a single copper wire loop to produce an oscillating magnetic field of B0.1 mT in amplitude.…”

Section: Methodsmentioning

confidence: 99%

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Optically detected cross-relaxation spectroscopy of electron spins in diamond

et al. 2014

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The application of magnetic resonance spectroscopy at progressively smaller length scales may eventually permit 'chemical imaging' of spins at the surfaces of materials and biological complexes. In particular, the negatively charged nitrogen-vacancy (NV À ) centre in diamond has been exploited as an optical transducer for nanoscale nuclear magnetic resonance. However, the spectra of detected spins are generally broadened by their interaction with proximate paramagnetic NV À centres through coherent and incoherent mechanisms. Here we demonstrate a detection technique that can resolve the spectra of electron spins coupled to NV À centres, in this case, substitutional nitrogen and neutral nitrogen-vacancy centres in diamond, through optically detected cross-relaxation. The hyperfine spectra of these spins are a unique chemical identifier, suggesting the possibility, in combination with recent results in diamonds harbouring shallow NV À implants, that the spectra of spins external to the diamond can be similarly detected.

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Section: Resultsmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Optically detected cross-relaxation spectroscopy of electron spins in diamond

et al. 2014

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“…H. Wang et al used the level anticrossing in the ground state (GSLAC, ~ 1000 G, see figure 2a). 26 Basic ideas are same with the ESLAC researches. They proved the magnetic field dependent polarization transfer mechanism from NV center to the first shell 13 C by flip-flop hyperfine elements.…”

Section: Polarization Transfer Mechanismmentioning

confidence: 99%

Minireview on Nuclear Spin Polarization in Optically-Pumped Diamond Nitrogen Vacancy Centers

Jeong¹

2016

Journal of the Korean Magnetic Resonance Society

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Nitrogen vacancy-centered diamond has recently emerged as a promising material for various applications due to its special optical and magnetic properties. In particular, its applications as a fluorescent biomarker with small toxicity, magnetic field and electric field sensors have been a topic of great interest. Recent review 1 (R. Schirhagl et al 2014) introduced those applications using single NV-center in nanodiamond. In this minireview, I introduce the rapidly emerging DNP (Dynamic Nuclear Polarization) field using optically-pumped NV center in diamonds. Additionally, the possibility of exploiting the optically-pumped NV center for polarization transfer source, which will produce a profound impact on room temperature DNP, will be discussed.

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“…[33]. While the GSLAC of the NV centre has been previously studied and exploited in several works [34][35][36][37][38][39][40][41], there is little knowledge about how T 1 varies and how the spin dynamics (including optical initialization) behaves at transition frequencies relevant to NMR, close to the GSLAC.…”

Section: Introductionmentioning

confidence: 99%

Anticrossing Spin Dynamics of Diamond Nitrogen-Vacancy Centers and All-Optical Low-Frequency Magnetometry

et al. 2016

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We investigate the photo-induced spin dynamics of single nitrogen-vacancy (NV) centres in diamond near the electronic ground state level anti-crossing (GSLAC), which occurs at an axial magnetic field around 1024 G. Using optically detected magnetic resonance spectroscopy, we first find that the electron spin transition frequency can be tuned down to 100 kHz for the 14 NV centre, while for the 15 NV centre the transition strength vanishes for frequencies below about 2 MHz owing to the GSLAC level structure. Using optical pulses to prepare and readout the spin state, we observe coherent spin oscillations at 1024 G for the 14 NV, which originate from spin mixing induced by residual transverse magnetic fields. This effect is responsible for limiting the smallest observable transition frequency, which can span two orders of magnitude from 100 kHz to tens of MHz depending on the local magnetic noise. A similar feature is observed for the 15 NV centre at 1024 G. As an application of these findings, we demonstrate all-optical detection and spectroscopy of externally-generated fluctuating magnetic fields at frequencies from 8 MHz down to 500 kHz, using a 14 NV centre. Since the Larmor frequency of most nuclear spin species lies within this frequency range near the GSLAC, these results pave the way towards all-optical, nanoscale nuclear magnetic resonance spectroscopy, using longitudinal spin cross-relaxation.

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Sensitive magnetic control of ensemble nuclear spin hyperpolarization in diamond

Cited by 69 publications

References 57 publications

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Minireview on Nuclear Spin Polarization in Optically-Pumped Diamond Nitrogen Vacancy Centers

Anticrossing Spin Dynamics of Diamond Nitrogen-Vacancy Centers and All-Optical Low-Frequency Magnetometry

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